Natural satellites of the Solar System

There are currently 173 known natural satellites (or moons) in the Solar System, excluding the moons of dwarf planets. The largest natural satellite in the Solar System is Jupiter's moon, Ganymede. Ganymede and Saturn's largest moon, Titan, are bigger than the planet Mercury. Earth's Moon is the fifth largest moon in the Solar System after Ganymede and Triton (listed above), Callisto and Io. Titan often appears to be on because of its dense atmosphere which makes it appear to be just gas, ad the surface of the moon is not visible. Only 7 of the 173 known moons in the colar system are more than 2,000 kilometers in diameter.